Найдем пересечение множеств А и В:
A = {x | x ∈ Z, x > 7} = {8, 9, 10, 11, 12, 13, 14, 15, ...}
B = {x | x ∈ Z, x ≤ 15} = {..., 13, 14, 15}
A ∩ B = {x | x ∈ Z, 7 < x ≤ 15} = {8, 9, 10, 11, 12, 13, 14, 15}
Ответ: A ∩ B = {8, 9, 10, 11, 12, 13, 14, 15}